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Radioiodinated progesterone derivative for progesterone receptor targeting with enhanced nucleus uptake via phenylboronic acid conjugation
Author(s) -
Gao Fei,
Peng Chenyu,
Li Jindian,
Zhuang Rongqiang,
Guo Zhide,
Xu Duo,
Su Xinhui,
Zhang Xianzhong
Publication year - 2019
Publication title -
journal of labelled compounds and radiopharmaceuticals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 47
eISSN - 1099-1344
pISSN - 0362-4803
DOI - 10.1002/jlcr.3741
Subject(s) - phenylboronic acid , chemistry , derivative (finance) , progesterone receptor , nucleus , receptor , stereochemistry , combinatorial chemistry , endocrinology , medicine , biochemistry , microbiology and biotechnology , estrogen receptor , catalysis , cancer , breast cancer , biology , financial economics , economics
A novel 131 I‐radiolabeled probe with aromatic boronate motif ( 131 I‐EIPBA) was designed to target progesterone receptor (PR)–positive breast cancer with enhanced nucleus uptake. Acetylene progesterone was conjugated with pegylated phenylboronic acid via click reaction and radiolabeled with 131 I to afford 131 I‐EIPBA. Meanwhile, 131 I‐EIPB without boronate was prepared as control agent. After determination of the lipophilicity and stability of these tracers, in vitro cell uptake studies and in vivo biodistribution in rats were performed to verify the enhanced nucleus uptake and PR targeting ability of 131 I‐EIPBA. 131 I‐EIPBA was obtained with moderate radiochemical yield (40.35 ± 3.52%) and high radiochemical purity (>98%). As expected, the high binding affinity (39.58 nM) of 131 I‐EIPBA for PR was determined by cell binding assay. The internalization ratio of 131 I‐EIPBA was remarkably higher than that of 131 I‐EIPB in PR‐positive MCF‐7 cells. Furthermore, the enhanced nucleus uptake of 131 I‐EIPBA (0.59 ± 0.02%) was found to be significantly higher than that of 131 I‐EIPB (0.13 ± 0.01%) in MCF‐7 cells. A novel 131 I‐EIPBA compound was developed for PR targeting with improved cellular nucleus uptake. Furthermore, the introduction of aromatic boronate motif provides a worthwhile strategy for enhancing the nuclear receptor targeting of tracers.